ML13277A037

Duke Energy Presentation - Brunswick Mellla+ Methods Applicability, Pre-Application Meeting, August 20, 2013

ML13277A037
Person / Time
Site:	Brunswick
Issue date:	08/20/2013
From:	Duke Energy Carolinas
To:	Office of Nuclear Reactor Regulation
References
BSEP 13-0104
Download: ML13277A037 (18)

Text

Enclosure 1 BSEP 13-0104 Duke Energy Presentation

-Brunswick MELLLA+ Methods Applicability, Pre-Application Meeting, August 20, 2013 Brunswick MELLLA+Methods Applicability Pre-Application Meeting August 20, 2013$~DUKE ENERGY.

Brnsic MLA+ Methos Appiablt* Duke Participants" Roger Thomas" Jeff Boaz" Bill Murray" Charles Stroupe (Presenter)

• GEH Participants" Jens Andersen" Kent Halac" JD Kvaall" Jim Harrison*Bruce Hagemeier r@DUKE ENERGY.2

• Schedule* Introduction and Objectives

• Fuel and plant licensing analysis strategy* GEH Methods Applicability to AREVA fuel* AREVA Methods Applicability to MELLLA+: Approach* Summary 3 ENERGY.

Schedule.. ....... ....... .... ....................." MELLLA+ LAR submittal (both Units)+ B1C19 sample problem with ATRIUMTM 1OXM" BIC21 cycle specific application results to NRC Fall 2014 Fall 2015* First planned MELLLA+ cycle" MELLLA+ requested approval (both Units)* MELLLA+ implementation

1. During B1C21 refueling outage Spring 2016 Spring 2016 DUKE ENERGY.4

• Provide details on GEH methods applicability

1. GEH ability to model ATWS with AREVA fuel* AREVA methods applicability to MELLLA+: Approach~@DUKE 5 ENERGY.

" On January 8, 2013 Duke energy presented a pre-application meeting with the NRC. (ML13007A373)" Benefits of MELLLA+" Approach to fuel and licensing analysis strategies

• Thermal hydraulic stability solution (AREVA's Enhanced Option IIl)* Containment Accident Pressure (CAP)" Anticipated Transient Without SCRAM analysis" MELLLA+ impacts* Several follow up pre-application meetings were proposed.For today's meeting, methods applicability will be discussed.

• The NRC requested "The licensee should justify the use and applicability of the GEH generic MELLLA+ LTR to the AREVA approaches and the use of AREVA fuel assemblies." (ML13016A014)

DUKE 6 ENEGY Brunswick MELLLA+ Power Flow Map I 120.0 110.0 100.0 90.0 80.0 70.0 o 60.0 50.0 40.0 30.0 20.0 10.0 0.0 0.0 7.7 16.4 23.1 30.8 38.5 46.2 53.9 61.6 69.3 77.0 84.7 92.4 Mlbs/hr Core Flow 0 10 20 30 40 50 60 70 80 90 100 110 120 % Core Flow 7 NERGY.

" All topical areas of the MELLLA+ LTR will be addressed in the LAR* Duke Energy will address: " SAR Integration of GEH and AREVA input" APRM and Enhanced Option III setpoints and implementation

• Risk evaluation, procedure updates, operator training" Plant changes to mitigate ATWS (SLC B-10 enrichment increase)* Selected non-fuel impacts 8 ENERGY.

• GEH MELLLA+ LTR process (NEDC-33006P-A) with GEH methodologies and analyses will address:* Non-fuel impacts" Long term ATWS and ATWS instability explicitly modeling ATRIUMTM 1OXM fuel 9@"DUKE 9 ENNERGY.

Fuel and plant licensing analysis strategy AREVA* AREVA methodologies and analyses will address:° Fuel, core design, COLR fuel limits, LOCA, DBA" ATWS and ASME overpressure" Enhanced Option III (EO-Ill) stability solution$~DUK ENERGY.10 GE ehd Appiablt to AR A fue* GEH will present information on methods applicability

• ATRIUM T M 10 Fuel Experience

• ATRIUMTM 1 OXM Fuel for ATWS Methods" Uncertainty Identification/Management Process* ATRIUMTM 1OXM Modeling Approach" Methods Application

• Core Modeling*ATWS Analysis*Applicable Interim Methods LTR and MELLLA+ LTR Limitations and Conditions

~@DUKE 11 ENERGY.

• GEH proprietary presentation will be given at this point in the presenation 12 $ENERGY.

" Schedule* Introduction and Objectives

• Fuel and plant licensing analysis strategy* GEH Methods Applicability to AREVA fuel* AREVA Methods Applicability to MELLLA+: Approach* Summary 1 DUKE 13 ENERGY.

AREA Mehoso Appiabltyt M LA: Approac" An AREVA methods applicability report has been generated that addresses:

Thermal-Hydraulics, Core Neutronics, Transient Analysis, LOCA and Stability.

• Report will be submitted for information with the LAR" Methods applicability report shows* There are no SER restrictions on AREVA methodology that are impacted by MELLLA+ operation* MELLLA+ core and assembly conditions for Brunswick are equivalent to core and assembly conditions of other plants for which the methodology was benchmarked

• Bundle operating conditions in the MELLLA+ regime are within the envelope of hydraulic test data used for model qualification and operating experience

• The AREVA methodology is applicable for MELLLA+ conditions at Brunswick 14DUKE 14 ENERGY.

Summary* GEH methods are applicable to ATRIUM the MELLLA+ condition TM 1OXM fuel in" ATRIUMTM 1OXM explicitly modeled* Uncertainties in modeling ATRIUMTM 1OXM fuel with GEH methods addressed* AREVA methods applicability to MELLLA+* Methods applicability report will be submitted with LAR 15 $ENERGY.

Brunswick MELLLA+ Fuels Methods Applicability Questions?

c@ uK R-XRGY.16 Selected Acronyms AL -Analytical Limit AP -Annulus Pressurization APRM -Average Power Range Monitor ATWS -Anticipated Transient Without Scram AV -Allowable Value BSP -Backup Stability Protection CAP -Containment Accident Pressure CIER -Channel Instability Exclusion Region COLR -Core Operating Limits Report DBA -Design Basis Accidents ECCS -Emergency Core Cooling System EO-Ill -Enhanced Option III EPU -Extended Power Uprate FWHOOS -Feedwater Heater Out Of Service FWT -Feedwater Temperature GEH -General Electric Hitachi HCTL -Heat Capacity Temperature Limit HSBW -Hot Shutdown Boron Weight LAR -License Amendment Request LOCA- Loss of Coolant Analysis LTR -License Topical Report MELLLA- Maximum Extended Load Line Limit Analysis MELLLA+ -Maximum Extended Load Line Limit Analysis Plus NC -Natural Circulation NPSH -Net Positive Suction Head NTSP -Nominal Trip Setpoint PRNM -Power Range Neutron Monitor SAR -Safety Analysis Report SBO -Station Black Out SLC -Standby Liquid Control SLO -Single Loop Operation SPT -Stability Protection Trip STP -Simulated Thermal Power TLO -Two Loop Operation 2RPT -Two Recirculation Pump 17